Details

Autor(en) / Beteiligte

• Kalita, Damian
• Rogal, Łukasz
• Czeppe, Tomasz
• Wójcik, Anna
• Kolano-Burian, Aleksandra
• Zackiewicz, Przemysław
• Kania, Bogusz
• Dutkiewicz, Jan

Titel

Microstructure and Mechanical Properties of Ti-Nb Alloys Prepared by Mechanical Alloying and Spark Plasma Sintering

Ist Teil von

• Journal of materials engineering and performance, 2020-03, Vol.29 (3), p.1445-1452

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2020

Quelle

springer (창간호~2014)

Beschreibungen/Notizen

• The effect of Nb content on microstructure, mechanical properties and superelasticity was studied in Ti-Nb alloys fabricated by powder metallurgy route using mechanical alloying and spark plasma sintering. In the microstructure of the as-sintered materials, undissolved Nb particles as well as precipitations of α-phase at grain boundaries of β-grains were observed. In order to improve the homogeneity of the materials, additional heat treatment at 1250 °C for 24 h was performed. As a result, Nb particles were dissolved in the matrix and the amount of α-phase was reduced to 0.5 vol.%. Yield strength of the as-sintered alloys decreased with Nb content from 949 MPa for Ti-14Nb to 656 MPa for Ti-26Nb, as a result of the decreasing amount of α-phase precipitations. Heat treatment did not have a significant effect on mechanical properties of the alloys. A maximum recoverable strain of 3% was obtained for heat-treated Ti-14Nb, for which A s and A f temperatures were − 12.4 and 2.2 °C, respectively.